The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 2010
Filed:
Jan. 24, 2008
Hiroshi Sakamoto, Hitachi, JP;
Tatsuya Ochi, Tokai, JP;
Yoshiyuki Yoshida, Hitachi, JP;
Tetsuo Matsumura, Hitachinaka, JP;
Kinya Fujimoto, Hitachinaka, JP;
Masashi Seimiya, Hitachinaka, JP;
Hiroshi Sakamoto, Hitachi, JP;
Tatsuya Ochi, Tokai, JP;
Yoshiyuki Yoshida, Hitachi, JP;
Tetsuo Matsumura, Hitachinaka, JP;
Kinya Fujimoto, Hitachinaka, JP;
Masashi Seimiya, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A worsening of drivability is to be kept to a minimum by making a fail-safe control taking the state in the event of failure of a shifting operation into account. When clamping a sleeve to a free rotatable gear and during the period after instructing movement of the sleeve to a clamping position until movement of the sleeve to a predetermined positional range which makes it possible to judge that the sleeve has been clamped to the free rotatable gear, a pushing load for the sleeve is increased if the sleeve is in a fixed state near the balk ring, while if the sleeve is in a fixed state near the free rotatable gear, the sleeve is once returned to a neutral position thereof and is re-clamped to the free rotatable gear. Further, the number of times the sleeve is re-clamped to the free rotatable gear is counted and the use of the free rotatable gear is inhibited in accordance with the counted number of times.